Cisco ASA Audit Event: 201010

Cisco ASA Events

The logs of network perimeter devices such as firewalls, antivirus applications and intrusion prevention systems contain crucial information that helps to pre-emptively block security attacks and breaches. Hence, it's mandatory for you to monitor and audit these logs. Because Cisco ASA provides the combined functionality of all the three, it becomes all the more important to monitor its logs. 

ManageEngine's EventLog Analyzer, a comprehensive log management solution, collects and analyzes the log data from Cisco ASA devices, triggers alerts and generate reports on detected security incidents thus helping you to take suitable measures against security threats, if any. 

Cisco » 201010: Embyonic connection limit exceeded

201010: Embyonic connection limit exceeded

Cisco ASA is a security device that provides the combined capabilities of a firewall, an antivirus, and an intrusion prevention system. It also facilitates virtual private network (VPN) connections.It helps to detect threats and stop attacks before they spread through the network.

Message: %ASA-6-201010: Embryonic connection limit exceededeconns/ limitfor dir packet from source_address/ source_port to dest_address/dest_port on interface interface_name.

Event 201010 is generated when an attempt to establish a TCP connection fails because of an exceeded embryonic connection limit, which would have been configured with the 'set connection embryonic-conn-max MPC'command for a traffic class. The message contains:

  • The current count of embryonic connections associated to the configured traffic class.
  • The configured embryonic connection limit for the traffic class.
  • The first packet that initiates the connection on the interface.
  • The source IP address and port number.
  • The destination IP address and port number.
  • The name of the interface on which the policy limit is enforced.

How could you resolve this situation?

This event does not require any action.

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